Fluid mechanics measurement based on the anisotropic core structure of pseudophase singularities in analytic signal representation of speckle pattern

Wei Wang; Mark R. Dennis; Reika Ishijima; Tomoaki Yokozeki; Akihiro Matsuda; Steen G. Hanson; Mitsuo Takeda

doi:10.1117/12.725123

18 June 2007 Fluid mechanics measurement based on the anisotropic core structure of pseudophase singularities in analytic signal representation of speckle pattern

Wei Wang, Mark R. Dennis, Reika Ishijima, Tomoaki Yokozeki, Akihiro Matsuda, Steen G. Hanson, Mitsuo Takeda

Author Affiliations +

Proceedings Volume 6616, Optical Measurement Systems for Industrial Inspection V; 66160W (2007) https://doi.org/10.1117/12.725123
Event: Optical Metrology, 2007, Munich, Germany

Abstract

A new technique for fluid mechanics measurement is proposed that makes use of pseudophase singularities in an analytic signal representation of a speckle-like pattern generated by a Laguerre-Gauss filter operation. Based on the formal analogy between the polarization of the vector wave and the gradient field for the complex analytic signal, a set of Stokes-like parameters have been applied for the description of the anisotropic core structure of the pseudophase singularities, which serves as unique fingerprints attached to the seeding particles moving with the flow. Experimental results for flow velocity and acceleration measurement are presented that demonstrate the validity of the proposed optical vortex metrology for fluid mechanics measurement.

Citation Download Citation

Wei Wang, Mark R. Dennis, Reika Ishijima, Tomoaki Yokozeki, Akihiro Matsuda, Steen G. Hanson, and Mitsuo Takeda "Fluid mechanics measurement based on the anisotropic core structure of pseudophase singularities in analytic signal representation of speckle pattern", Proc. SPIE 6616, Optical Measurement Systems for Industrial Inspection V, 66160W (18 June 2007); https://doi.org/10.1117/12.725123

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available